Appeal 2007-3373
Application 10/477,363
1
2 One skilled in the art knows that hydroxyl and amino containing
3 compounds will react with acid groups to covalently bond. For example, a
4 Berg alcohol with a hydroxyl group (R1) would be expected to be bonded to
5 the acid group of a Berg dendrimer (R2) to form an ester group:
6 R1―OH + R2―COOH → R1―COO―R2 + H20
7 A Berg amine with an amino group (R3) would be expected to be
8 bonded to the acid group of a Berg dendrimer (R2) to form an amido group:
9 R3―NH2 + R2―COOH → R3―NHCO―R2 + H20
10 Suitable modifying compounds include aliphatic alcohols, phenols,
11 and fatty acids. Col. 3:42-46.
12 Berg tells one skilled in the art that additives can be present in the
13 dendrimer. Col. 5:21.
14 The additive may enter into an interaction with groups which are
15 present in the dendrimer. Col. 5:13-14.
16 Additives include benzophenones, phenols and amines, e.g., 2,6-di-t-
17 butyl-4-methylphenol (col. 5:43), 2-hydroxy-4-n-octoxybenzophenone
18 (col. 5:47) and N,N-di(2,2,6,6-tetramethyl)-4-piperidyl)-hexamethylene-
19 diamine (col. 5:54).
20 The dendrimer can have more than one additive. Col. 5:29-30.
21 Berg does not describe a reaction product of a carboxy-functional
22 additive with poly(ethylene glycol)-monomethyl ether and
23 dimethylolpropionic acid.
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Last modified: September 9, 2013